Machine for hammering or tapering piston-rings.



No. 690,320. Patented nec. 3l, i'solf n. ROBERTSON.

MACHINE FDR HAMMERING 0R TAPERING PISTDN RINGS.4 I,

(Application lcd Aug. 3; 1901.)

(No Model.)

YH: Nonms versus co, manurno. mswmm'omp h.

UNITED STATES PATENT OFFICE.

DAVY ROBERTSON, OF GOTI-IENBURG, SWEDEN.

MACHINE FOR HAMMERING OR'TAPERING PlSTON-RING'S.

SPECIFICATION forming part of Letters Patent No. 690,320, dated December 31, 1901.

T0 va/ZZ whom, t may concern.'

Beit known that I, DAvY ROBERTSON, a subject of the King of Sweden and Norway, residing at Gothenburg, in the Kingdom of Sweden, have invented new and useful Improvements in Machines for Hammering or Tapering Piston-Rings, of which the following is a specification.

The present invention relates to taperingmachines which serve for the hammering of piston-rings, at whose middle portions the hammering strokes or blows are of greatest strength,while toward the free ends of such rings the strength of the strokes is gradually diminished. 'This is accomplished by means of a hydraulic brake arrangement,which controls the stroke of the hammer, and the action of which brake is varied mechanically with reference to the position of the hammer.

Figure l is a sectional elevation of the tapering-machine. Fig. 2 is a plan View of a part of the same.

Within the stationary ring A an annular carrier or ring B is rotatably j ournaled. On its periphery the ring B is provided with gearteeth E, so that it can be rotated by the wormgear C. The removable ring X secures the position of the ring B. To the ring B is fas-- tened the ring D, which serves as a support for the packingrings to be hammered. The size of ring-support D to be fastened to the annular carrier is determined by the diameter of the packing-ring. F. Its inner diameter must, however, be such that the work or blank F will fit exactly therein.

A hammer H and a chisel M are made use of in the hammering of the packingring or blank. The hammer is under action of spring W. The turning of cam S moves the hammer away from the chisel and extends the spring lV. lVhen released, the hammer strikes with the power of spring W against the chisel M and presses the latter against the piston-ring F,whereby such ring is condensed or packed at the portion struck. The strength of the hammer-strokes is to be varied according as the piston-ring is hammered at the middle or at its ends. For this purpose a braking arrangement is employed, the action of which is regulated mechanically.

To the side arm or crank K of the hammer is' connected the piston-rod I of piston Z, the

Application iiled August 3, 1901I Serial No. r770,816. (No model.)

latter moving in cylinder G. This cylinder is constructed in the tank L, which contains the brake iiuid. By means of openings above the piston the cylinder G communicates with the fluid-compartment of vessel L, and consequently the up-and-down movement of the piston Z, caused by the hammer movement, transports a portion of the iiuid'froin the cylinder into the vessel, and vice versa. The quantity of fluid conveyed is to be regulated by means of slide or valve T,Whicl1 surrounds the cylinder -jacket and which is provided with suitable outlets or holes O. According as these openings aline more or less with those in cylinder G a greater or less amount of fluid is conveyed from the piston Z. The position of thevalve or slide T is made dependent upon the rotation of the annular car'-, rier B,the latter being provided with a wedgelike or inclined rim P. Against this rim rests the roller Q of the feeler-lever R, which, With lever-arm V, is secured to an axle, Fig. 2. By means of the arm or rod Y the slide or valve T is connected to the lever-arm V, so that the position of the valve depends on whether the roller Q rests on a higher or lower portion of the rim P.

The reference-numeral l denotes a spring attached to an arm of the sliding rod or arm Y for the purpose of keeping this rod in the highest position. The slide-rodY is connected the arm B,to which is attached also the feelerlever R, which carries the roller Q. Consequently by means of spring l the roller Qis pressed against the spring P.

The tapering-machine operates in the following manner:v Upon the rotation of the ring or carrier B, effected by the driven Wormgear O, the hammer II strikes continuously against the chisel M thereby tapering the packing-ring or blank F. If now the roller Q rests upon a rising or lowering portion of the rim P, the lever-arm V, and with it the valve or slide T, is slowly depressed or raised, so that the openings of the slide pass over the holes or openings of the cylinder G. The luids in-and-out passage is then more or less prevented, and the stroke of the hammer H is weakened in consequence. Only when the roller Q rests upon the lowest portion of rim P are the holes in cylinder G entirely free or open, and the hammer works without IOO y track U.

Instead of the fluid resistance there can of course be applied a different braking arrangement, which is to govern for the purpose of varying the action-of the hammer H.

What I-claim as new, and desire to secure by Letters Patent, is-

1. A machine for hammering or tapering piston-rings comprising a hammer or striker, an annular carrier provided With a Wedge-like or inclined rim, a'feeler made to contact with thev rim, and a brake for the hammer engaged or adjusted by the feeler substantially as described.

2. Ahammer or tapering-machine comprisingastriker, a carrier for the Work, a rim or inclined face on the carrier, a lever actuated 'by the rim, a fluid-brake for the hammer, and

a'slide-valve or closure for the outlets of the Huid-brake engaged by the rim-actuated le-` ver substantially as described.

3. A carrier and a hammer orstriker, combined with actuating mechanism substantially asdescribed for the hammer, a brakepiston connected to the ham mer, a cylinder for the piston provided with outlets for the braking or retarding fluid, a slide or valve for the outlets, and a lever actuated by the carrier for adjusting the valve. substantially as described.

4. A hammer and a brake-piston therefor, combined with av cylinder having outlets, a valve for the outlets, an arm or rod for actuating the valve, an actuating-lever for the arm, and a carrier having an actuating rim or face for the lever substantially as de' scribed.

5. A machine for hammering or tapering piston-rings comprising a hammer-.or striker, an annular carrier provided with a ringshaped support D and with a Wedge-like or inclined rim, a feeler made to' contactW-ith the rim, and a brake for the hammer engaged or adjusted by the feeler substantially as described.

6. A hammer and a brake-piston therefor, combined with an adjustable carrier or plate N for the hammer, a track along which said plate can he adjusted, a cylinder having ou tlets, a valve for the outlets, an arm or rod for actuating the valve, an actuating-lever for the arm, and a carrier having an actuating rim or face for the lever substantially as'described.

In testimony whereof I have hereunto set my hand in the presence 0f two subscribing Witnesses. i

DAVY RoBERTsoN.

Witnesses'.

HILMER ALMIEZ, DAVID ANDERssoN. 

